Interesting facts about space.

Launched as GRAIL A and GRAIL B in September 2011, the probes were renamed Ebb and Flow by schoolchildren in Montana. The probes operated in almost circular orbit near the lunar poles at an altitude of approximately 34 miles, until their mission came to an end in December 2012. The distance between the twin probes altered a bit as they soared over areas of lesser and greater gravity that were caused by visible topological features on the Moon's surface, such as impact craters and mountains--as well as by masses that were secreted beneath the lunar surface.

and here is another

"For the smallest craters that we're looking at, we think we're starting to see where the Moon has gone through so much fracturing that it gets to a point where the porosity of the crust just stays at some constant level. You can keep impacting it and you'll hit regions where you'll increase porosity here and decrease it there, but on average it stays constant," Dr. Soderblom continued to explain to the press on September 10, 2015.

and finally

Second, there is the issue of sharing wealth. The Third World wants to redistribute wealth in its favor, and it pursues this end by a combination of moral persuasion and threats of terrorism using weapons of mass destruction. A frontier could make such threats less persuasive. The Third World reaction to a space frontier initiative is unpredictable and possibly violent. This makes pioneering a taboo for Western governments. And that's why they would keep it secret.

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Other authors make similar assertions. In Our Mysterious Spaceship Moon (Dell, 1975), author Don Wilson publishes the following conversation between the Eagle crew and Mission Control, presumably picked up by ham radio operators during a broadcast interruption attributed by NASA to an "overheated camera":

The moon, unlike other celestial objects, or even earthly objects for that matter, has ambivalent connotations in the pages of tradition and folklore. The full moon is more so because of its enigmatic aura and understated presence. The full moon has always been witness to many incidents; pages of descriptions dot more books than not about several events unfolding on a full moon night. It somehow brings out an ominous feeling in a storyline.

From these observations planetary scientists were able to determine that almost 98% of the gas in the plume is water, about 1% is hydrogen, and the rest is a combination of other molecules that include methane, ammonia, and carbon dioxide.